Asteroids

2015TB145 help

Last update: 2026-09-18 13:00 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.295

Aphelion (Q)

3.909

Eccentricity (e)

0.860

Inclination (i)

39.7

deg

Orbit period (P)

1113.1

Earth MOID

0.00450

U parameter

0.3

Next Earth close approach

Date

2085-10-23

Nominal distance (from Earth center)

0.16107

24095068

Maximum Brightness

19.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

600

Taxonomic type

Rotation period (T)

2.938

Discovery Information

Discovery Date

2015-10-10

Observatory

Pan-STARRS 1, Haleakala

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.101933

1-sigma variation

2.187E-8

Unit

Eccentricity (e)

Value

0.859862

1-sigma variation

3.606E-8

Unit

Inclination (i)

Value

39.7389

1-sigma variation

8.184E-6

Unit

Long. of Ascending Node (Ω)

Value

37.5548

1-sigma variation

3.232E-7

Unit

Arg. of Perihelion (ω)

Value

121.8355

1-sigma variation

8.740E-6

Unit

Mean Anomaly (M)

Value

225.09738

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.294561

1-sigma variation

Unit

Aphelion distance

Value

3.909305

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.010379

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.628645

1-sigma variation

Unit

MOID

Value

0.004496

1-sigma variation

Unit

Orbit Period

Value

1113.0808

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.78199E-16	1.93302E-16	-3.79689E-14	8.89290E-17	3.67751E-14	-4.18492E-13
e	1.93302E-16	1.30042E-15	-2.80170E-13	6.08853E-16	3.14450E-13	-1.29960E-13
i	-3.79689E-14	-2.80170E-13	6.69829E-11	-2.51359E-13	-6.77664E-11	2.46899E-11
Ω	8.89290E-17	6.08853E-16	-2.51359E-13	1.04435E-13	3.24910E-14	-4.58244E-14
ω	3.67751E-14	3.14450E-13	-6.77664E-11	3.24910E-14	7.63860E-11	-2.25884E-11
M	-4.18492E-13	-1.29960E-13	2.46899E-11	-4.58244E-14	-2.25884E-11	3.67499E-10

Date of computation: 2026-09-18 13:00 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

2.938

Unit

Source

[1]

Quality

Value

3,R

Unit

Source

[1]

Amplitude

Value

0.13

Unit

mag

Source

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.022

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.06

Unit

Source

[3]

Diameter

Value

600

Unit

Source

[3]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.56

Unit

V-R

Source

[4]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[5]

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Sources

No.	Name	Additional
[1]	EARN	1.) Warner, B.D. et al. (2016) MPB 43, 141-142. (LIGHTCURVE ANALYSIS OF THE NEAR-EARTH ASTEROID 2015 TB145) 2.) href="http://www.jpl.nasa.gov/news/news.php?feature=4760"> NASA Press Release on 2015 TB145
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	EARN	1.) href="http://www.jpl.nasa.gov/news/news.php?feature=4760"> NASA Press Release on 2015 TB145 2.) Mueller, T.G. et al. (2017) Astron. Astrophys. 598, A63. (Large Halloween Asteroid at Lunar Distance) (2015 TB145)
[4]	EARN	1.) Mueller, T.G. et al. (2017) Astron. Astrophys. 598, A63. (Large Halloween Asteroid at Lunar Distance) (2015 TB145)
[5]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) href="http://www.jpl.nasa.gov/news/news.php?feature=4760"> NASA Press Release on 2015 TB145

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

3286

Unit

Source

[1]

Unobserved

Value

724

Unit

Source

[1]

Normalized RMS of residuals

Value

0.288057

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-10-10.53168

Unit

Source

[2]

Last Observation

Value

2024-10-08.447303

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1875 (3)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2015-10-30

Unit

Source

[3]

Last Observation

Value

2015-11-01

Unit

Source

[3]

Delay (Discarded)

Value

6 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

8 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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Max residual (arcsec):

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Computation parameters

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Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2015TB145 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1969-11-06 21:22	< 1 min	0.1581225	0.1581085	0.0000047
EARTH	2015-10-31 17:00	< 1 s	0.0032541	0.0032541	0.0000000
EARTH	2085-10-23 18:54	< 1 min	0.1610656	0.1610482	0.0000058
EARTH	2088-11-01 19:58	< 1 min	0.0589225	0.0589052	0.0000058

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
307.79821802	295.69308017	0.00449624	MINIMUM
37.96159716	151.08772557	0.50912870	MINIMUM
354.50783763	37.74275475	0.77394456	SADDLE
356.72404386	227.03101000	1.26012719	SADDLE
177.68392143	243.06909581	3.11433192	SADDLE
181.68224978	64.26505750	4.77353904	MAXIMUM

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MOID Plots

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